NextIP 获取下一个或上一个IP地址
(ip net.IP, increment bool)
| 43 | |
| 44 | // NextIP 获取下一个或上一个IP地址 |
| 45 | func NextIP(ip net.IP, increment bool) net.IP { |
| 46 | // 将IP转换为大整数 |
| 47 | ipb := big.NewInt(0).SetBytes(ip) |
| 48 | |
| 49 | if increment { |
| 50 | ipb.Add(ipb, big.NewInt(1)) |
| 51 | } else { |
| 52 | ipb.Sub(ipb, big.NewInt(1)) |
| 53 | } |
| 54 | |
| 55 | // 转换回IP格式 |
| 56 | b := ipb.Bytes() |
| 57 | |
| 58 | // 确保字节长度正确 |
| 59 | if len(ip) == 4 { // IPv4 |
| 60 | b = append(make([]byte, 4-len(b)), b...) |
| 61 | } else { // IPv6 |
| 62 | b = append(make([]byte, 16-len(b)), b...) |
| 63 | } |
| 64 | |
| 65 | return net.IP(b) |
| 66 | } |
| 67 | |
| 68 | // ParseHost 解析主机字符串，返回Host结构体 |
| 69 | func ParseHost(hostStr string) (Host, error) { |
no outgoing calls
no test coverage detected